90 



HYDROGEN ION CONCENTRATION 



If the salt is the product of a strong base and a weak acid whose 

 dissociation constant is ka, then the same relationships as given 

 above are appHcable except that [OH"] is substituted for [H+] and 

 the degree of hydrolysis is defined as 



T = 



[OH- 



[C] 



TABLE 16 

 Table of values for the degree of hydrolysis at room temperature 



TABLE 17 

 Table of pH values in solutions of hydrolytic salts 

 pH values in the solution of a salt of a weak base and a strong acid, or pOH- 

 values in the solution of a salt of a strong base and a weak acid. K is the dis- 

 sociation constant of the weaker constituent. 



In table 16 the values given by Bjerrum of the degree of hydrolysis 

 were calculated for various values of the dissociation constants, the 

 latter given in round figures. 



The values above the upper stair-line are obtained from equa- 

 tion (6), the values between the stair-lines from equation (8) and 



